Acoustic apparatus



June 6, 1933. w. H. HUTTER ACOUSTIC APPARATUS Filed March 1932 2Sheets-Sheet 1 J J) 1921/67: Z07.-

Zdllz'am M,

June 6, 1933. w. H. HUTTER ACOUSTIC APPARATUS 2 Sheets-Sheet 2 FiledMarch 3, 1952 Patented June 6, 1933 UNITED STATES WILLIAM H. HUTTER, OFFORT WAYNE, INDIANA ACOUSTIC APPARATUS Application filed March 3,

This invention relates to acoustic apparatus and includes among itsobjects the provision of novel and improved acoustic apparatus suitablefor use in conjunction with 5 a radio set or with any other suitablesource for delivering energy to be converted into sound, whereby theacoustic or sound emitting apparatus may be attached to or form membersof the radio cabinet or may be constructed as one or more unitspositionable in desired locations and operable by and controlled fromthe remotely located radio set; whereby the sound is diffused ordistributed instead of being projected in one or more definitedirections; whereby the quality and fuilness of tone of the sound areimproved by novel. means; and whereby, in general, to provide such novelacoustic apparatus which is adapted to resonate over substantially theentire audible frequency range and to respond with fidelity to the soundvibrations from such converters as loud speakers.

Other objects and advantages of the invention will be apparent from thefollowing drawings, in which similar characters of reference indicatesimilar parts throughout the several views.

In the drawings:

Figs. 1 and 2 are perspective views of complementary acoustic unitsembodying some of the features of my invention;

Figs. 3 and 7 are perspective views of complementary acoustic unitsembodying other features of the invention;

Fig. at is a perspective view of novel complementary acoustic unitssimilar to those shown in Figs. 1 and 2, illustrating a use thereof;

* F ig. 5 is a perspective view of a multiple acmistic unit of the typeadapted to be remotely positioned in respect of the source for supplyingthe sound convertible energy; and

Fig. 6 is an elevation of a unit similar to that shown in Fig. 5, butemploying a single I sound converter or loud speaker to resonate theunit.

In order to accomplish the foregoing objects, I employ acousticapparatus includdescription, and from the accompanying 1932. Serial No.596,471.

.nected to, for example, a radio, a phonograph, or a combined radio andphonograph, such as shown at 14 in Fig. 1. lVhere more than one loudspeaker 12 is employed in the acoustic apparatus, they may be soarranged and connected that they have the proper phase relation.

The particular size and shape of, and means for obtaining the desiredresonance characteristics in the columns 11, and the location of thecolumns are unimportant, it being only important that the resonance 70characteristics of each column approximate those of the associatedspeaker. For example, as shown in Figs. 1 and 2, the columns may take agenerally rectangular shape adapted to serve as front and back, top and75 bottom, or other opposite sides or walls of the radio cabinet 14, seeFig. 4. On the other hand, as shown in Figs. 3 and 5 to 7, the columnsmay be separate from and even remotely positionable in respect of thesource of energy for conversion into sound and may be substantiallytubular in shape. These columns also illustrate in Figs. 3 and 7 thecomplementary units which may be positioned at desired locations, andthe multiple units with one (see Fig. 6) or more (see Fig. loud speakers12 for providing a large baflie area for the sound and for diffusing thesound to attain a space effect as distinguished from the discordantblasts so noticeable and undesirable in known acoustic apparatus.

Illustrative of the means for obtaining the desired acousticcharacteristics, the columns 11, as shown in Figs. 5 and 6, may be ofdifferent lengths and different sizes, and a loud speaker, associatedwith each column, is adapted to resonate its associated column (see Fig.5), or a single loud speaker adapted to set up substantially all of thevibrations for the fundamental tones and overtones of substantially allqualities is associated with a plurality of such columns ofdifferentsizes and lengths. (See Fig. 6.)

As shown, however, in Figs. 1, 2 and l, I may select a loud speaker res)onsive to relatively high frequencies and a speaker of relatively lowfrequencies and mountthe former near an end of a side wall 15, and thelatter near an end of a side wall 16 of a column ll, by means of aclampi 1''; ring 17 and screws 18. The side wall 15 carrying the highfrequency speaker is provided with a plurality of a, ertures 15 aboutthe periphery of the speaker in order to eliminate sounds of lowfrequency and to establish an equilibrium of air pressure at oppositesides of the speaker.

Now to this side wall 17 carrying the high frequency loud speak-er. Iattach a channel 21 of a suitable sounding board material. such asstraight n'rain spruce, provided with. a sound insulating" gasket- 22 ofrubber or felt. This channel has a hard and well polished finish and ofcourse is susceptible to various modifications in shape andconstruction, such as cross-bracing, sectionalization. and aperturino;in order to provide the column with resonance characteristicsapproximating: those of the associated loud speaker and in order toimprove the quality of sound emanating therefrom.

A channel 23 of heavier mater al is suitably attached to the side wall16 carrying the low frequency loud speaker to provide a column adaptedto be resonated by such a sneaker. This column is lined with a suitablesound damping material 2%, such as felt o acoustic celotex. and may beprovided with. drapes 25 arranged to hang from near the top of thecolumn inwardly thereoi to absorb sounds of high frequency.

The columns shown in Figs. 3 and 7 may be constructed to resonate athigh and lower frequencies. respectively. as described above.

i ls already mentioned. he instant invention contemplates an improvedwal for radio cabinets. As shown. in Fig. 4. a high frequency columnsuch as the one shown in Fig. I may form one side of the radio cabinet14. and a low frequency column such as that shown in Fig. 2 may form theopposite side of the cabinet 1%,. hen so arranged. I overcome cabinetreverberation and the effects of cabinet resonance by cross-bracingbetween the side walls 15 and 16. As illustrated, the control panel 26as well as the supports for the radio units may serve this function.

The aco c columns may be provided with a cover 2? naving' a plurality ofsound escape apertures or louvers 28 behind which I arrange tine silk toproduce a finished appearance. lVhere desired, the columns may also beprovided with openings or slits 29 of de sired shapes and designs torelieve the air at the mouth of the speaker.

Thus it will be seen that I have provided acoustic apparatus suitablefor use in conjunction with a source from which energy may be suppliedfor conversion into sound and sound conversion apparatus for convert--ing such energy into sound, the conversion apparatus being associatedwith resonating columns providing a large baflle area to cause diffusionand distribution of the sound from the conversion apparatus and adaptedto provide side walls of a radio cabinet or to be remotely positioned inrespect thereof.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent of the United States, is:

1. In acoustic apparatus, a plurality of sound cmiverters adapted toresonate at ditlcrcnt frequencies and a sound column for ea h saidconverte' adapted to be resonated by the associated converter to theexclusion of the other converters.

In acoustic apparatus for sound producing: means. a sound converterresponsive to relatively high frequencies. a sound converter responsiveto lower frequencies, and. means associated with the first saidconverter to eliminate sounds of such lower frequency.

2-3. In acoustic apparatus for sound producing means, a sound converterresponsive to relatively high frequencies, a sound converter res'ionsive to lower frequencies. and means associated with the secondmentioned sound converter to absorb sounds at relatively highfrequencies.

4:. In acoustic apparatus for sound producing: means, a sound converterresponsive to relatively high frequencies. a sound converter responsiveto lower flfBQHGllOlQS, and means associated with each said soundconverter for eliminating the frequencies at which the other said soundconverter resonates.

The combinatioi'x of energy emittilu up paratus adapted to emit energyfor conversion fato sound with sound converting means adapted to convertthe energy emitted by said apparatus into sound. and sound ditl'usingmeans associated with said sound cmivertinp, means and remotely positoned in respect to said energy emitting apiimratus.

6. The combination of sound producing means including a source of energywith a phirality of acoustic columns remotely positioned with respect tosaid, source of one: y and adapted to ditl'usc the sound from said soundproducing means.

7. An acoustic apparatus "tor radio sets comprising a relatively highfrequency loud speaker, a low frequency loud speaker, and an acousticcolumn carrying each said loud speaker and adapted to resonatetherewith.

S. The combination of a radio receiving set with an acoustic column atopposite sides thereof adapted to resonate at different audiblefrequencies.

9. The combination of a radio receiving set with a relatively highfrequency acoustic column forming a side of said radio receiving set,and a low frequency acoustic column forming the opposite side of saidradio receiving set.

10. The combination of a radio receiving set with a relatively highfrequency acoustic column forming a side of said radio receiving set, alow frequency acoustic column forming the opposite side of said radioreceiving set, and means extending between said acoustic columnspreventing cabinet re verberation.

11. In acoustic apparatus for radio receiying sets, a plurality oftubular columns adapted to resonate a different frequencies and a loudspeaker associated with each said tubular column and adaptedto resonateit.

12. In a radio receiving set, a tubular acoustic column and anassociated loud speaker remotely positioned in respect of said radioreceiving set and adapted to convert energy from said set into sounds ofhigh pitch, and another tubular column and associa-ted loud speakeradapted to convert energy from said set into sounds of lower pitch thanthat of the first said column and associated speaker.

13. An acoustic apparatus adapted to be used as a side of a radiocabinet, comprising a side wall, a loud speaker carried therein near anend thereof, and a channel member of a material resonating at thefrequencies of sounds from said loud speaker and secured to said sidewall.

1 1. A side wall of a radio cabinet and a loud speaker carried in saidside wall, in combination with a channel member secured to said sidewall and constructed of sounding board material.

15. A side wall of a radio cabinet and a loud speaker carried therein,in combination with a channel secured to said side wall and. a sounddamping lining in said channel.

16. A side wall of a radio cabinet and a loud speaker carried therein,in combination with a channel secured to said side wall, a sound dampinglining in said channel, and sound absorbing means carried between saidchannel and said side wall.

In witness whereof, I hereunto subscribe my name this 26th day ofFebruary, 1932.

WILLIAM H. I-IUTTER.

DISCLAIMER 1,912,454.-William H. Hatter, FortWayne, Ind. Acous'rrcAPPARATUS. Patent dated June 6, 1933. Disclaimer filed September 13,1935, by the patentee.

Hereby enters this disclaimer to that part of the specification which isin the following words, to wit:

Claim 2means associated with said converter to eliminate sounds of suchlower frequency, except where said means to eliminate said sounds ofsuch lower frequency directly affects the sound per se, as distinguishedfrom energy convertible into sound.

Claim 3means associated with the second mentioned sound converter toabsorb sounds at relatively high frequencies, except where said means toabsorb sounds at relatively high frequencies affects the sound per se,as distinguished from energgi convertlble mto sound.

aim 4'-meansassociated with each said sound converter for eliminatin thefrequencies at "which the other said sound converter resonates exceptwhere sai means is for eliminating sound frequencies as distinguishedfrom energy frequencies convertible into sound.

Qflici Gazette October 8, 1935.]

DISCLAIMER 1,912,454.W'illiam H. Hatter, Fort-Wayne, Ind. Aoous'rrcAPPARATUS. Patent dated June 6, 1933. Disclaimer filed September 13,1935, by the patentee.

Hereby enters this disclaimer to that part of the specification which isin the following words, to wit:

Claim 2means associated with said converter to eliminate sounds of suchlower frequency, except where said means to eliminate said sounds ofsuch lower frequency directly affects the sound per so, as distinguishedfrom energy convertible into sound.

Claim 3means associated with the second mentioned sound converter toabsorb sounds at relatively high frequencies,. except where said meansto absorb sounds at relatively high frequencies affects the sound perse, as distinguished from energy convertible into sound.

Claim 4means associated with each said sound converter for eliminatingthe frequenciesat-Which the other said sound converter resonates exceptWhere sai means is for ehmmating sound frequencies as distinguished fromenergy frequencies convertible into sound.

[Oficial Gazette October 8, 1985.]

